Maybe i am just worrying too much. I have been checking my puppies gums and teeth a lot lately and i have noticed that he has lost atleast 4 teeth that i can see. But i noticed around his front top and bottom teeth his gums are a little darker then the sides. When i really pull his lip up, i notice the top of his gums are pink . He is not acting strange or differently. Everything about him is normal. i brush his teeth and i also give him dentatreat with his food ( which is dry food). He also chews on booda bimple bones and many other things to help keep his teeth clean and to help out with the teething. He has very strong teeth and jaws and if my hands could talk they would surely tell you that (LOL).If anyone knows anything about this or have experienced this, please give me some advise before i worry myself to death.Thanks so much!!!